Experimental study of a centrifugal pump operating as a hydraulic turbine

An experimental investigation of centrifugal pump has been carried out to study its characteristics in and turbine mode operation (PAT). The correlation between PAT performance is a major problem. Several methods have developed predict the best efficiency pumps running as turbines, but their results are not good coincidence with data for all pumps. Fluid dynamic behavior changes appreciably, relation localized distributed hydraulic losses, velocity profiles pressures at homologous points. It possible infer using similarity parameters from performance; very large errors made. This paper presents operating specific number low. In order determine pump’s characteristic turbine, we used closed-circuit setup which admission pressure head was realized another diameter three different ranges flow determined. based on an database 17 .80 [RPM, m3 /s, m] bothrotation modes speed range rotation 250 2500 RPM. All required were measured achieve complete curves reverse pump. functional characterization showed machine variation parameters, such speeds, heights, rates. With obtained, comparatives made allowed observing influence these variations PATs. Curves obtained inferring parameters. Values derived correlations match results.